Malicious PDF — malware analysis report

Static analysis result for SHA-256 558e64a31143c1c3…

MALICIOUS

PDF

54.0 KB Created: 2020-08-07 00:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff72bb1da5ddac949a3cb70efc24cb5 SHA-1: 7e700f43484e319d82c9443075ffb0a8f160c15a SHA-256: 558e64a31143c1c39a849c6a0aa91e1e6af2853216b5b4bac4251a8b1c6b61fa
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources. One URL, 'https://ttraff.ru/pify?keyword=difference+between+engineering+stress+strain+and+true+stress+strain+pdf', is flagged as a known malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=difference+between+engineering+stress+strain+and+true+stress+strain+pdf
    • http://files.edgeproductions.ca/uploads/1/3/1/4/131437147/a1982cdea5fa.pdf
    • http://files.firstchristiancompton.org/uploads/1/3/0/7/130775021/9484298.pdf
    • http://fuvivepe.rosemaryeagle.com/uploads/1/3/1/3/131379578/4367575.pdf
    • http://files.mygentlebeginnings.com/uploads/1/3/2/7/132740424/9403006.pdf
    • https://cdn.shopify.com/s/files/1/0450/1661/3014/files/unified_hud_project_uhud_v3._7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/32791128486.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/dezalopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/benevisupefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/81065586889.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/bromazepam_bula.pdf
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/buku_agama_islam_kelas_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/ksde_report_card.pdf
    • https://cdn.shopify.com/s/files/1/0450/8883/3701/files/mario_vazquez_gallary.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/texte_allemand_facile_avec_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/xamikolovig.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/kunekevuwexuguleno.pdf
    • https://cdn.shopify.com/s/files/1/0431/4919/7472/files/rails_flash_now.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/add_draft_watermark_to_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/89175507117.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d9c.bin
e66f5bf724d4720eeb25469cf4ea1f3dd6085a9b2a0f156ee8e20851468838b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9C 5524 bytes
font_01_sfnt_off0000908c.bin
5013e3b6ac971117005dfd8672ff0038ff69f82cfdf7f3f99e9bc1349b1b067f
pdf-font-stream PDF embedded font (sfnt) at offset 0x908C 10312 bytes
font_02_sfnt_off0000b41d.bin
c20ec5398f07f90df21f3b69433a6d1888c3f75713c6873c227b42dad0e1c929
pdf-font-stream PDF embedded font (sfnt) at offset 0xB41D 16100 bytes